US4814419AExpiredUtility

Polyarylether sulfones useful for molding into a circuit board substrate

51
Assignee: AMOCO CORPPriority: Dec 21, 1987Filed: Jun 20, 1988Granted: Mar 21, 1989
Est. expiryDec 21, 2007(expired)· nominal 20-yr term from priority
Inventors:Robert J. CotterStephen B. RimsaRobert Barclay, Jr.
C08G 75/23H05K 1/0333
51
PatentIndex Score
8
Cited by
3
References
4
Claims

Abstract

Described herein are circuit board substrates prepared from certain poly(aryl ethers) based on 4,4'-dichlorodiphenyl sulfone.

Claims

exact text as granted — not AI-modified
What is claimed is: 
     
       1. The poly(aryl ethers) of the formula   --O--E--O--E'--     wherein E is from about 5 to about 95 mole percent of the residuum derived from ##STR6## and about 5 to 95 mole percent of the residua derived from at least one diphenol compound selected from the group consisting of 4,4'-biphenol and bisphenol-A and wherein E' is the residuum of 4,4'-dichlorodiphenyl sulfone.   
     
     
       2. The poly(aryl ethers) of claim 1 wherein E comprises about 20 to about 80 mole percent of the residuum of 4,4'-biphenol. 
     
     
       3. The poly(aryl ethers) of claim 1 wherein E comprises about 20 to about 80 mole percent of the residuum of bisphenol-A. 
     
     
       4. The poly(aryl ethers) of claim 1 wherein E comprises about 20 to about 80 mole percent of the residua of bisphenol-A and 4,4'-biphenol.

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